What is CVE-2021-32542?

CVE-2021-32542 is a medium-severity vulnerability in Sysjust Cts Web, classified under Cross-site Scripting. CVSS score: 4.7/10. Published 2021-05-28.

How severe is CVE-2021-32542?

Medium severity. CVSS v3 base score is 4.7 out of 10.

XSS in Sysjust Cts Web

CVE-2021-32542

The parameters of the specific functions in the CTS Web trading system do not filter special characters, which allows unauthenticated attackers can remotely perform reflected XSS and obtain the users’ connection token that triggered the attack.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-05-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.007 (50.9th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Sysjust Cts Web — versions unspecified
Sysjust Cts Web

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.twcert.org.tw/tw/cp-132-4758-82b05-1.html (Third Party Advisory)
www.chtsecurity.com/news/40e165e2-e539-49bc-bcf1-e3b27c29e344 (Third Party Advisory)

Frequently asked questions

What is CVE-2021-32542?: CVE-2021-32542 is a medium-severity vulnerability in Sysjust Cts Web, classified under Cross-site Scripting. CVSS score: 4.7/10. Published 2021-05-28.
How severe is CVE-2021-32542?: Medium severity. CVSS v3 base score is 4.7 out of 10.